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Installation
Installation Site
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Piping Installation
4. Maintain the operating ambient temperature in the range of
5℃ to 40℃. Operating this unit cooler below 5℃ can result
in failure of the compressor. On the other hand, operating
the cooler at a temperature higher than 40℃ can degrade
heat dissipation from the condenser, thereby activating the
safety device and stopping the cooler operation. When
ambient temperature is anticipated to reach 40℃ or above,
install a duct to conduct outside air to the suction port on the
cabinet or prepare an exhaust port to discharge hot air. In
arranging such devices, you must use care so that air
capacity of the fan may not be reduced.
Model RKS400F-S RKS500F RKS750F
Fan airflow (m
3
/ min) 50/60Hz 10.5/11.5 26/29
5
．
If ducting is to be installed, consult with qualified installation engineer.
IMPORTANT
● If ducting is to be installed, be sure to construct it such that there is no narrowing along the
way. Failure to do so can result in built-in safety devices activating, which can cause product
operation to stop.
Piping Installation
CAUTION
●Make sure that piping is installed reliably and correctly. Failure to do so can result in water
splashing on nearby items.
1. Water piping
RKS400F-S RKS500F RKS750F
Water tank capacity (L) At least 20 At least 25 At least 35
Inlet port size Rp3/4
Outlet port size Rp3/4
Drain port size M10 female thread
2. If the cooling water flow rate is low, the compressor may
frequently cycle on and off, leading to breakdown of the
compressor.
3. Insulate water pipes.
4. When making piping connections to the product, apply 2 or 3 wraps
of sealing tape around the PVC valve pipe coupling (customer
supplied), and tighten to a maximum of 29.4 N·m. Tightening
over this amount will damage the product.
29.4N・m or below
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